Hi, I was trying to understand how the transfer function is derived from a sallen-key topology using this pdf on page 2: http://www.vyssotski.ch/BasicsOfInstrumentation/AnalysisOfTheSallen-KeyArchitecture.pdf
He starts by using kirchoffs law to obtain equations at certain points. What i was wondering is, at equation 1, how does the author conclude to such results when kirchoffs law states that at a node, all the currents are equal to zero.
Thanks
He starts by using kirchoffs law to obtain equations at certain points. What i was wondering is, at equation 1, how does the author conclude to such results when kirchoffs law states that at a node, all the currents are equal to zero.
Thanks